A company called Weaved (http://www.weaved.com/) has released a tool that is still under beta testing while writing this book. It enables you to remotely log in to Raspberry Pi that is connected to the Internet from anywhere on the Web (apart from a local network). There is also a tutorial to install and use the tool (https://www.juicypi.io/access-your-raspberry-pi-anywhere-in-the-world-using-weaved/). This enables remote control/data collection.